In initial shots, the time machine's computer is a Commodore 64 with a 1541 floppy disk drive, which is also generates the screens and provides voice synthesis. Later on, it inexplicably changes into a Commodore Amiga 2000, complete with separate keyboard, which was previously in Nick's living room.
Matthew Paul speculates that if he put $100 in the bank then traveled 100 years into the future, "the interest alone would make you a millionaire." You'd have to deposit much more than $100 if you expected to get rich off the interest. No bank offers an interest rate that would yield $1 million of interest from $100, even if you waited 100 years before withdrawing it.
In the opening sequence, Nick reaches into the plane with his left hand to retrieve the floppy disk. We see a right hand retrieving the disk, but Nick isn't holding the disk when he pulls his hand back out.
Nick steals a car to escape the Gen-Cor guards. The car crashes into a pile of bikes and flips over on its side. As it tips over, you can see the device used to make the car flip sticking out of the bottom of the vehicle.